Accept it! And then move on! There are no other (healthy) options.
Thankfully we live on a planet that has more than 7 billion people. Odds are in your favor there is more than "one" person who would "get you", love and appreciate you and vice versa. It's important to keep life in perspective. Everyone experiences heartache.
The vast majority of us (fail) our way to success when it comes to relationships. If this were not true all of us would end up married to our high school sweethearts!
Rarely does someone hit a homerun the first time up at bat in the game of love. Oftentimes we are too young and immature to realize the odds were against us until after we look back when we are in our 30s, 40s and beyond.
Awhile back I wrote a hub about the myth of "the one" https://hubpages.com/relationships/thereismorethan...
Best of luck!